The organizers of Muddy Fanatic test racers' athleticism by plotting a 5K course through the Sellersburg woods. Participants charge through obstacles that range from slippery ascents out of creek beds to fire-lined paths. After competing to reach the finish line, participants must lend each other a hand to surmount Mud Mountain, a steep wall of earth rising above a pool of knee-deep water.
To celebrate the day's displays of fortitude, organizers pour every drinking-age participant a free beer, as well as provide additional drinks and food for purchase. Muddy Fanatic's team also encourages racers to self-nominate themselves for awards that include muddiest, best body, and best and worst costume. Audience members determine the winners by applauding and throwing roses at their favorites.